Fix OS detection for OpenSolaris

[terminalmage]

This fixes the OS detection for OpenSolaris, allowing it to be properly
recognized and for 'os' and 'osrelease' grains to be set correctly.

[terminalmage]

Actually hold off, this breaks Solaris 10 detection.

[techhat]

It breaks it? And I trusted you!

[terminalmage]

Well it fixes OpenSolaris.... It just breaks Solaris. 😄

[terminalmage]

OK, should be good to merge now, pending review:

In [41]: release_re = re.compile(
   ....:                         r'((?:Open)?Solaris|OpenIndiana) (Development)?'
   ....:                         r'\s*(\d+ \d+\/\d+|oi_\S+|snv_\S+)?'
   ....:                     )

In [42]: release_re.search('Solaris 10 10/09').groups()
Out[42]: ('Solaris', None, '10 10/09')

In [43]: release_re.search('OpenSolaris Development snv_134 X86').groups()
Out[43]: ('OpenSolaris', 'Development', 'snv_134')

In [44]: release_re.search('OpenIndiana Development oi_151.1.8 X86 (powered by illumos)').groups()
Out[44]: ('OpenIndiana', 'Development', 'oi_151.1.8')

[ghost]

Test PASSed.
Refer to this link for build results: http://jenkins.saltstack.com/job/salt-pr-build/1632/

[ghost]

Test PASSed.
Refer to this link for build results: http://jenkins.saltstack.com/job/salt-pr-build/1633/